Motorman&#39;s valve.



INVENTEIR- REY.

fltty PATBIITED FEB. 26, 1907. F. B. COREY. MOTORMANS VALVE. APPLICATION FILED MAR. 1?, 190a.

WiTN E55 ES,

. UNITED sTA'r s FRED B. COREY, OF SCHENECTADY,

PATENT OFFICE.

NEW YORK, ASSIGNOR TO GENERAL MOTORMANS VALVE.

Specification of Letters Patent.

Patented Feb. 26, 1907.

Application filed March 17,1986. Serial No. 805.566-

To all whom, it may concern:

Be it known that I, FRED B. COREY, a citizen of the United States, residing at Schenectady, in the county of Schenectad and State of New York, have invented certain new and useful Im rovements in Motormens Valves, 5

of which t 1e following is a. specification.

M invention relates to a motorman's or engineers valve; and its object is to provide a valve having a number of novel and advantageous features.

One feature of my invention relates particularly to valves of the rectilinear reciprocating type. It has ordinarily l' son the practice in such valves heretofore to'groove the valve-seat to form both the slide and the lateral guides for the valve. Such a valveseat, however, is difficult to grind properly, and consequently some valves have teen arranged heretofore with raised sea-ts. In such a valve the seat itself cannot act as a guide, and when the walls of the lronnet or casing are used to form the lateral guides for the valve it restricts the opening into the bonnet and ordinarily necessitates sonic s eciel arrangement of the operating-hand e on account of the difficulty of machining the inside of the bonnet in the usual way.

One feature of my invention consists in forming the valve-scat with a raised slide.

. but providing a loose yoke resting on the valve-seat on opposite sides of the slide adapted to form the lateral guides for the valve and to he pressed by the bonnet upon the seat with this arrangement the advantages of the raised seat are obtained, while at the same time the disadvantages or a restricted opening at the bottom of the honnet. are avoided, so that a standard arrange ment of the operatinq handle is possible.

Another feature OFH'Q." invention relates to the guard for the end of the operating-s indle that projects heyond the casing. has been proposed heretofore to surround the outer end of the spindle by a guard or shroud so arranged as to make it impossible to move the spindle except hy means of a handle adapted to enter the shroud, and thus to prevent the valve being moved by meddlesome persons One form of shroud that. has been used l'ieret-olore comprises an incomplete ring supported by a casing and lying substantially flush with the end of the spindle. The opening in the ring was left for the l passage of a projection on the handle when 1 the handle is applied and removed, so as to insure that the valve is leftin lap ositiou when the handle is removed. In or or that V the valve mi ht he moved after this projection on the andle had passed through the open portion of the ring when a.p iv the handle, the lower portion of the sliroiii? was i cutaway on each side of the open portion, so that circumferentially rojectin ton es Ere formed, which were ikely toie bro en 0 One feature of my invention consists in forming the shroud of a complete ring, so as ito give it maximum mechanical strength, an in order to provide for insuring the rei moval of the handle only when the valve is in lap position I provide the ring with a rejecting flange havm a. slot through whic i a proi jection on the handle must pass when the l handle is removed.

My invention will best be understood by reference to the accompanying drawings, in which- 1 Figure i shows an elevation in cross-sec- .tion' of a nzotormans valve constructed in accordance with my invention. Fig. 2 shows an elevation in cross-section on the line 2 2 of Fig. 1 of the valve-seat, valve, and yoke. l Fig. 3 shows a perspective view of the valve E with the bonnet removed, and Fig. 4 shows a,

plan vieivof the shroud.

In the drawings, A represents the valve- 5 seat, which is provided with a raised slide a, provided with the usual ports. Since this i slide projects above the breast of the surface of the valve-seat, it may readily be ground perfectly true.

B represents a valve adapted to he reciprec-uteri on the slide a.

C represents a loose yokewhich rests on the valve-seat on each side of the slide a and which is adapted to serve as lateral guide for the reciprocating valve B. i The yoke C is pressed down upon the valve-seat- A by the compression-spring D, the lower end of which has a hearing in the socket r, formed for this purpose on the yoke C.

The valve B is transversely slotted, as is shown in Figs. '2 and 3, to receive the block E, (shown in Fig. 1,] which is engaged by a stud f, carried ecccnlricullv hya flange j" i on the operating-spindle F, which extends through the casin G. B y rotating the spindlo, F the valve g is moved rectilinearly on its seat.

The upper side of flange f bears against the surface f on the inside of the easing or "bonnet G, and it is evident that this surlrace should be tight, ,It Is evident that if the yoke were forined integral with the bonnet G grinding surface would be a very difficult matter. Since, however, the voke C is a loose member, the opening at t c bottom of the bonnet .as wide as in a valve of the rotary type, and free access is obtained to the surface 1' for grindig.

It will be seen that the socket c is 111 line ,with theaxis of the spindle F and that the upper end of the compression-spring does not bear directly on t e bonnet, but instead -hasabearing in a socket in the spindle F.

Conscquentlythis single spring serves both to press the yoke C upon the valve-seat, as been mentioned above, and also to press the flangcf'zupward against the snrfacej" of the bonnet G. p In. order to prevent meddlesome ta1nper- 'ing with the valve, the bonnet G carries a H shroud g, which surrounds the outer endof the spindle F and lies practically flush path theendofthe spindle. This shroud g is m a the form of a complete ring, as shown in Fig. *4,;and consequently may be designed with an; desired mechanicalstrength, and is pro- 1 vi edwith an outwardly-projecting flange l 35fg, which has a deep slot g and two notches at g". -'I'he shroud is preferably cut away at the bottom, as indicated at in Fig. 1, so i that, dust and dirt may readi y be removed. H represents the operating-handle, which is 4O 'P l'j0iYldBd with a portion h, adapted to enter 'the'shroud g and'engage the squared end of the. spindle F, so as 'to o crate the valve. iflhe handle also is provide \fith a projecting tongue 1:, adapted to pass through the slot 5 in the flange when the handle is ap lied and removed. This tongue k and the s t 2 insure that the handle will be removed on y 1 V when the valve is in lap osition. The handie is also provided wit the usual spring- 50' pressed member h, adapted to engage the notches g in the flange y when the valve is moved to its opcrat ive positions. WhatI claim as new, and desire to secure by Letters Patent of the United States, is 1. In combination, a valve-seat having a raisedhslide provided with ports, a valve "adapted to be reciprocated on-said slide, a- I loose member resting on said sent and adaptto formllateral guides for said valve, an mclosing bonnet or casing adapted to engage s 'dn ernber, and to press said member upon said seat.

combination, a valve-seat having a raisede slide provided with ports, a valve 'ptedito be reciprocated on said slide, a

ound so as to be practically air 1 r loose member resting on said seat and adapted to form lateral guides for said valve, an inc-losing bonnet or casing, and a compression-spring interposed between said member and said bonnet adapted to press said memher on said seat.

3. In combination, a valve-seat having a raised slide provided with ports, a valve adapted to be reciprocatcd on said slide a loose yoke resting on said seat on both si cs 01 said slide and adapted to form lateral guides for said valve, on inclosing bonnet or casing adapted to engage said yoke and to press it on said seat, a rotatable spindle extending through said bonnet per endicuto said slide, and connections etween I larly sai spindle and said valve whereby the rotary movement of the spindle reciprocates the valve on the slide.

4. In combination, a valve-seat having a raised slide provided with ports, a valve adapted to be reciprocated on said slide, a loose yoke resting on said seat on both sides of said slide and adapted to form lateral guides for said valve, an inclosing bonnet or casing, a compression-spring interposed between saiclyoke and said bonnet ada ted to press said oke on said seat, a rotatab e spindle extending through the bonnet perpendicularly, to said slide, and connections be tween the spindle and the valve whereby the rotary movement of the spindle reciprocates the valve on the slide.

5. In combination, a valve-seat having a raised slide provided with ports, a valve adapted to be reciprocated on said slide, a loose yoke resting on said seat and adapted to form lateral guides for said valve, an inolosing bonnet or easing, an operating-spindle extending through said bonnet perpendicularcy to the slide and operatively connected to the valve, a flange on said spindle adapted to bear against the inner side of said bonnet, and a compression-spring interposed between said spindle and said yoke adapted to press said flange against the bonnet and the yoke againstthe seat.

6. In combination, a valve-seat having a raised slide provided with ports, a valve adapted to be reciprocated on said slide, a loose yoke resting on said seat and adapted to form lateral guides for said valve, an inc-losing bonnet or casing, an operating-spindle extending through said bonnet perpendicularlv to the slide and operatively connected to the valve, a flange on said spindle adapted to bear against the inner side of said bonnet, a socket carried by said yoke in line with the axis of said spindle, and a compressionspring hearing at one end in said socket and at the other against said spindle.

7- In combination, a valve, an inclosing casing therefor, an operating-spindle for the valve extending through the casing. n shroud surrounding the outer end of the spindle casing therefor, an operating-spindle for the valve extending through the casing, a shroud surrounding the outer eml of the spindle oompri n. complete ring carried by said an lying substantially flush with the end-of said s indle, an outer slotted flange carried by sai shroud, and a handle having a portion adapted to enter said shroud and engage ssid'spmdle and a second portion adapted to 1pass through the slot in said flan e.

9. n combination, a valve, an inc using casing therefor, an operating-spindle for the valve extending through the casing, a shroud surrounding the outer end of the spindle com 20 prising a com lete rin earned by said easin and lying su stantia y flush with the on of said spindle, an outer flange carried by said shroud hsvi a slot and o plurality of notches, a handle ving a portion adopted to enter said guard and engage said spindle and a second portion adapted to pass throl b the slot in said flange and means carried y the handle for yieldingly engaging the notches inlsaid flange in the several positions of the 0 vs. ve.

In witness whereof I have hereunto set my' hand this 16th day of March, 1906.

FRED B. COREY.

Witnesses:

BENJAMIN B. HULL, HELEN 0mm). 

